Bradley, J. C. 1959: The influence of the American Entomological Society upon the study of Hymenoptera. Transactions of the American Entomological Society, Philadelphia 85 (4), S. 277-301, B15 10217, pp. 283

Osborn, H. 1952: A Brief History of Entomology Including Time of Demosthenes and Aristotle to Modern Times with over Five Hundred Portraits. Columbus, Ohio, The Spahr & Glenn Company, 1-303 S., B15: 6024a, pp. 174